Let me share my experience with EMS

Express Mail Service is service offered by GPO, Nepal. When i had to send the documents, the rate was about 1200 flat (or little over 1000) for good up to 500 grams (or 1kg) and additional 350 per 500gm count. ie. 1550 for 1kg (or 1.5 kg). They give you a tracking number and USPS delivers you at place. They might even send you a delivery confirmation SMS after it has been delivered, which i received 2 days after I knew from the person who was supposed to receive it.

Now based on what others have posted, it is hard for me to believe that in about 400-500. But i once heard that one of my friends' dad managed to send the documents real cheap using EMS. The person at the post office proceeded as if the letter was ordinary (not express) and threw in the lot assigned for priority (or Express) ones. The letter was delivered as 'Express' for cheaper cost.

May be your brother might have done something like that.. But I think and wish the document be delivered to you safely.

Hope for the best